Genuine OEM Audi EGR Valve, part number 078131101AG. This valve is a critical component of the exhaust gas recirculation system, designed to precisely meter and recirculate a portion of exhaust gases back into the engine's intake. It is installed on the left side of the engine. Constructed from durable cast metal, it weighs approximately 0.236 kg. Choosing a genuine OEM EGR valve ensures precise calibration and reliable operation, maintaining factory-specified emission levels and preventing engine performance issues often associated with aftermarket alternatives.